Metal-cutting tip.



E. G. LUENING.

METAL UU'I'IING TlP.

APPLICATION FILED 12.4, 1913.

Patented Aug. 11, 1914.

EUGENE G. TJUENING, OF CHICAGO, .ILLINQ' s'rs'rns i igrnn'tr cl rion.

;. ASSIGNOB. I DAVI-BOURNONVILLE COMPJQNY, OF NEW YORK, N. Y AND CHICAGO, ILLINOIS, A CORPORATION OF Yome METAL-CUTTIN G TIP.

Application filed April 4, 1913.

To all 11:11am it may concern:

Be it known that I, Eoonxn G. Lunsixo, a citizen of the United States, residing at Chicago, county of Cook, State of Illinois, have made a certain new and useful Invention in Metal-Cutting Tips, of which the following is a specification.

This invention relates to metal cutting tips and. particularly to tips employed in the ogiygen-acetylene or similar gas mixture cutting processes.

The object of the invention is to provide a construction of cutting tip which 18 simple, efi' cie'nt, and, economical to make.

A further ohject is to provide e tip of the nature referred to wherein provision is made 7 forent-raining a low pressure gas by the use 7 central longitudinal section on the line 1, 1,

Fig. 1.

Fig. 2, of a cutting tip embodying the principles of my invention. Fig. 2 a trans uerse section of the same on the line 2, .2 Fig. 3 is an inside face view of the removable head end portion of the tip.

In the use of cutting tips of the nature and class employed for cutting metals with gas mixture flames,"it is customary to provide moans for-supplying a preheating flame as well as what may be termed a reheating flame, one or both, to the metal to be cut in addition to the'cutting jet itself, the pro heating flame being applied to the metal, in advance of the cutting flame, with. reference to the direction of the cut, while the reheat ing flame follows the cutting jet, and serves to clear out the heri made by the cutting jet. The cutting jet consists of pure oxygen alone, while the preheating and reheating flames are required to d lopintense heat. Consequently the preheatmg and reheatingflames are ordinarily sustained by a gas in conjunction with oxygen, or a mixture. of suitable gesesin the required proportion to Specification of Letters Patent.

Patented Au". 11, 1911.

Serial No. 758,772.

roduce the necessur heat. The rcheatin .Y P g and reheating flames, being required to develop a. high degree of heat, nury'be sustained by either high or lowpressure gases, or mixture of gases, SllCllffOf instance as acetylene gas, coal gas, Blah gas,-'illuininating gas, or the like, used in con'junction'or mixed with oxygenflm other combustion supporting gas under high pressure. It has been found in practice that Whenhigh pressure is used in conjunction with low' pressure gas, or is to be mixed therewith, the flow of the high pressure gas may be-u'tilized to entrain or pause a corresponding correct.flo'vv of the lowpressure gas in the require *proportion to iforin a proper mixture to 'm'eefithe re-' qui'rements. 'Itis among the Special purposes ot my present invention to provide a single tip structure \vherein -this result is accomplished in a simple and "eflic'ieiitfinanner with respect to the ouygeh oi' ot her gas mixture of high pressure, with acetylene gas, coal gas, Blau gas, *illu ninati'iffigas or. the like of low pressure, for thepreheating and reheating flames, one or botli, without regard tothesupply of as for the cut ting flame or jet. v In the drawingI have flsho'wnagsimple structure as an illustrativecmhodiment of my invention, wherein "5isf'th bod of the tip longitudinally through which drilled the ducts or passages 6, 7, andjffi, the duct (3 constituting the channel through which the cutting flame or jet supplygas'is'conducted, while 7 and 8, are, respectively-the i 'hannels or ducts through which theiproheating and reheating flame gases a re conducted. It will he observed that these ducts are 'parallelto each other and they lie in the sameplane centrally and longitudinally tliroughthe tip, thus in use bringing the several unseen the delivery on of the tip in line with each other in th direction in which they cut is to be made, the preheating flame in advance and the reheating flame in the rear of the cutting flame. In practice, and in order to bring the maximum heat of the preheating flame. to bear on the surface of'the metal to he cut, themctal 0-1" the tip body is cut away or jogged oil at the delivery end of the duct, as indicated at A. Since ordinarily tho'pre heating flau'e is required to devolo. a" more intense heat than the reheating flame the duct 7, is made of larger transverse sectional receiving end of the tip body is counteroored centrally thereof, and the counterbore is interiorly threaded to receive the extcriorly threaded portion 10, of a removable end portion or plug 1.1. This end portion or plug is provided with a longitudinal central bore 12, which is thus l ought into line and registered with the bore 6 of the tip body, for the passage of the cutting flame gas. This plug is also provided with a circumferential channel 13,-to which, when the tip is inserted in the usual head, is supplied the oxygen or other gas under high pressure which is to be mixed with low pressure gas to supply the preheating and reheating. flames. The plug or portion 11, is suitably off-set from the end surface of the tip bodyto form or there is otherwise formed a peripheral channel 14, to which, when the tip is inserted into its head, the low pressure gas is supplied. The ducts 7, 8, terminate in this peripheral channel and preferably in cone shaped depressions 15. Carried by the plug or portion 11, are nipples 16, 17 having central longitudinal bores 18, 19 arra ed in central relation and alinement wit the ducts, 7, 8, respectively, the said bores 18, 19,

both opening into the peripheral channel 14,

while the ends of the nipples are presented toward and directed into the conical depr'essions 15. The nipples are suitably secured in seats formed in the plug 11 to-receive them.- By making the plugs 11, removable the'seats for thenipplesmay be readily and easily formed; therein, and '-:t he nipples inserted and secure djin 'placeixY-said seats, and

the tip'i assembly completed hyfsimply screw-. ing the threaded a; '10 u e 1 ug into the threaded counter qithe'gtip body; Itrwill be observed that; Withthe' construction showngandastabov described, the nipples operate as injectors fcause the flow of high pressure gasagf the (ihannel 13, through the bore fthe' nipples iind on iiito the ducts 7,8. entrain and carry along into said ductgs ith i'tlithelovv pres; sure as, thus securing an injector action in the eed and supply of the dew pressure gases. h

Having now set forth theobjeotand nature of my invention, and a constriction inbodying the principles thereof, wh'a as new and useful and desirefto'seurefby Letters Patent is,

1. In a metal cutting flame havin a cuttin flame as su )olv duct and 1 an auxiliary flame gas supply duct, an end portion rcmovably connected to said tip body, and a nippie carried by said end portion and arranged in line with said auxiliary [lame as duct said in) )lc and duct re- 's 'iectively receivinga high pressure and a low pressure gas supply'source.

in a metal cutting flame tip, a tip body having a cutting fialne gas supply duct and an auxiliary flame gas supply duct arranged in parallel relation to each other, a. removable end portion for said tip body, said end portion having peripheral channels to receive, respectively, high and low pressure.

nelsJ-J 4. In a metal cutting flame tip, a tip body having a central duct and an auxiliary duct parallel to each other, and a removable-end portion for thetip body, said end portion having a' nipple-with its delivery end presented toward. the mouth of the auxiliary du'ct, said nipple and mouth respectively re-j ceiving a high and low pressure gas suppll' t 5. In a metal cutting flame tip, a tip b0 y having a central duct and auxiliary ducts arranged on opposite sides. thereof and in arallel relation 'to each other, said bod aviag anend portion, said end portion aving ..uipples respectively presenting toward and into proximit to the mouths of said auxiliary dll(.llS,Slld nipples and 'mouths-respectivelyfreceiving high and low pressuregas supply.

In witness whereof I have hereunto set my hand this 25th day of March, 1913, in the presence of the subscribing witnesses. j

- E. G. LUENING.

Witnesses:

L. M. SHIELDS,

E. HdJonnsoN.

ortion 

